Web punching means



April 1965 F. A. LYON ETAL 3,178,979

WEB PUNCHING MEANS Filed May 51, 1962 3 Sheets-Sheet 1 QWFWM April 1965 F. A. LYON ETAL 3,178,979

WEB PUNCHING MEANS Filed May 31, 1962 3 Sheets-Sheet 2 CONTACTS D i 1 RESET im L 1 BYPASS SW.

FIG 5 INVENTORS FLOYD A. LYON CLEMENT R. KONAZEWSKI P O P 3,178,979 Umted States atent ce Famed,

14, FIG. 2. Magnetic brake 19 is also connected to 3,173,979 roller 9 and operates in conjunction with clutch 14 as will PUNCHING MEANS Floyd A. Lyon, Brookville, and Clement R. Konazewski, Glen Cove, N.Y., assignors to Halm Instrument Co., Inc., Glen Head, N.Y.

Filed May 31, 1962, Ser. No. 198,953 1 Claim. (Cl. 83--209) This invention relates to web punching means and more particularly to means for feeding and registering a web to a reciprocating punch.

This invention generally relates to means for punching or embossing a web with very accurate registration. The web is of the type having equally spaced indicia thereon for registration purposes, for instance, transverse conductive strips printed thereon. The registration must be accurate as the web may be preprinted as a label wrapper, for instance for cigar bands.

The invention generally comprises a reciprocating punch and the web is of the type having equally spaced indicia, for instance, conductive lines thereon. Means are provided for driving the web with a pair of input rollers and means are provided for sensing the registration marks on the web and stopping the web momentarily during the punching operation. The web stopping means comprise -a magnetic clutch and a magnetic brakeconnected to the drive rollers.

The sensing means comprise a pair of contacts which ride over the web which complete a control circuit through the conductive lines on the web. The contacts control a pair of Thyratron tubes which actuate the magnetic brake and the magnetic clutch.

Accordingly, a principal object of the invention is to provide new and improved web punching means.

Another object of the invention is to provide new and improved web or strip feeding means for a punch.

Another object of the invention is to provide new and improved registration means for punching a web.

Another object of the invention is to provide new and improved feeding and registration means for punching a web.

Another object of the invention is to provide new and improved high speed web punching and feeding means of very high accuracy.

These and other objects of the invention will be apparent from the following specification and drawings, of which FIG. 1 is a front view of an embodiment of the invention,

FIG. 2 is a top view of the embodiment of FIG. 1,

FIG. 3 is a side detail view of FIGS. 1 and 2,

FIG. 4 is a schematic circuit diagram of the electrical controls, and

FIG. 5 is a group of graphs illustrative of the operation of the invention.

Referring to the figures there is shown a conventional punch press 1 comprising a frame and a reciprocating die adapted to move up and down in gibbs or guides by means of a crank shaft 3. The crank shaft 3 is driven by the motor 4 by means of the belt 5 on the flywheel 6 which is mounted on the crankshaft.

The tape T is fed from a spool 7 around idler roller 8 by means of the driven roller 9. The tape passes between the driven roller 9 and the corresponding pressure roller'9' which is spring loaded by means of the spring 10. A suitable drag is placed on the input roller 7 by means of the roller 12 which is spring loaded by means of the spring 13 down against the roll of tape. Alternatively the driven roller 9 could be on the output side of the punch.

The roller 9 is driven by means of a magnetic clutch be explained. The input of the magnetic clutch comprises a gear 15 which meshes with a second gear 16 having an extending arm 17 which is connected to a long .arm 18 which extends to the other side of the press, the

other end of the arm 18 being pivotally connected to the driven sprocket 29. The sprocket 20 is driven from the crank shaft 3 by means of the sprocket 21, chain 22,

sprocket 45, gears 46, 47 and shaft 48.

As the crank shaft 3 turns in one direction, the arm 18 is oscillated back and forth, thereby causing the gears 16 and 17 to oscillate. The magnetic clutch is connected on the forward moving portion of its stroke to the drive roller 9 for the purpose of advancing the tape.

In the embodiment shown in FIG. 1 the tape is cut into two strips by the reciprocating die 25 or cutting wheel 23. The output strips then pass between idler rollers 26 and 27. Takeup spools 33 and 34 are driven by chain 35 connected to sprocket 20. For instance spool 33 is driven via sprocket 33', shaft 36 and clutch 37. The upper strip passes over idler roller 28 which is mounted on the arm 29 which is pivotally mounted to rise, thereby energizing the takeup motor 57 by means of the microswitch 57. Similarly, if there is too much slack in the lower strip around the roller 30, the arm 31 will rotate clockwise, causing the switch 58' to energize the motor 58.

.Microswitches 40 and 40' are provided adjacent the arms 29 and 31, respectively, to detect if the tape breaks, in which case the switches 40 and 40' are energized to shut off the apparatus as will be explained.

The proper registration is sensed by means of the contact strips 38, 39. As shown in FIG. 2 there is a series of conductive lines a, b, etc. on the tape T. When these pass under the contacts 38 and 29 a circuit is completed between the contacts which is used to control the registration of the drive means, which will be explained in connection with FIG. 3.

There are two cams on the crank shaft 3. .Cam 41 is a reset cam which permits triggering by the contacts only during a certain portion of the cycle. For instance there parallel with the contacts 38, 39. The purpose of cam 42 and switch 42 is to supply a signal in place of that of the contacts. This substitute signal will not maintain the registration. However, if the contacts miss, it will prevent the tape from being drawn back by the reverse operation of the clutch 14 which might cause breaking of the tape.

FIG. 5 shows a series of graphs illustrating the operation of the registration control components. Graph A shows the on and off portions of the tube V1 which operates the magnetic brake.

Graph B shows the on and oil portions of the tube V2 which operates the magnetic clutch.

Graph C shows the signals from the contacts 38, 39.

Graph D shows the cycle of the reset cam and switch. This arrangement permits sensing and brake operation only during the portion of the cycle when the reset switch is connected to brake 19.

Graph E shows the signals of the by-pass switch 42' which trail those of the contacts by a slight amount. The by-pass camsignal is set to the instant of zero motion of arm 17. The by-pass switch is connected in parallel with the contacts 38, 39 and will keep the machine operating if the contacts miss one or more conductive lineson the tape. The main purpose of the by-pass switch is to prevent the tape from' being drawn back by the reversing of the clutch and possibly breaking the tape, if the contacts 38, 39 miss.

FIG. 4 shows a schematic diagram of the electrical control circuit. Power is supplied to the terminals 50 and 51. The power may be 110 volts A.C. The motor 4 for the punch is connected across the power lines through relay tuated by cam 42 and its purpose is to apply a substitute contact 52a which is operated by relay coil 52. Relay coil 52 is connected in series with push button start switch 53, microswitches 40, 40 and stop push button 56. The microswitches 46 and 40' are adapted to sense broken tape or web. Holding contact 52 is connected in series with the start switch 53. Therefore, when the motor is started by pushing the start switch and the contac 52b will complete the circuit until the stop button 56 is pushed. When coil 52 is energized it also closes normally open contact 520 and opens normally closed contact 52d. When stop switch 56 is opened contact 52d will close and supply a connection to brake 19.

Tape or web takeup motors 57 and 58 are connected across the line in series with switches 57', 58. These motors operate the takeup drives and the switches ride on the web and sense the amount of slack. If there is too much slack then the switches 57' and 58- connect the motors to take up the slack. Transformer T is connected across the line for providing filament voltage to the gas tubes V1 and V2. Rectifiers R1 and R2 are connected in series with condensers C1 through resistor 60. Condenser C1 is adapted to charge up to 13+ voltage.

Rectifiers R3, R4 are connected across the line in series with condenser C2 and resistor 61. Rectifiers R3 and R4 are connected oppositely to rectifiers R1 and R2 so that condenser C2 charges in the opposite direction to provide a negative voltage on the conductor 62. The magnetic brake 19 is connected to the plate of gas tube V1 which may be a Thyratron.

The sensing contacts 38, 39 complete a circuit through the conductive strips a, b on the web or tape T from the positive voltage on lead 63 to the grid of the tube V1, thereby causing the tube V1 to conduct and draw current from B+ via lead 61. This causes a voltage drop at the plate of V1. This voltage is applied to the plate of V2 which is on, and cuts off V2.

Next, cam 41 operated reset switch 41' turns V2 on by applying a positive voltage to the grid of V2. This causes a voltage drop at the plate of V2 which is transmitted to the plate of V1 and cuts V1 off.

The magnetic clutch 14 is connected to the plate of the gas tube V2 and is adapted to be disconnected when the trigger if the contacts miss. This prevents the tape from being pulled back and broken by the reverse stroke of the clutch. By-pass switch 42 is not necessary for normal operation.

Many modifications may be made by those who desire to practice the invention without departing from the scope thereof which is defined by the following claim.

We claim:

In a continuously operating reciprocating punch, means to feed and register a web of a type having equally spaced conductive lines thereon comprising:

a drive roller for said web,

a magnetic clutch connected to said roller,

a magnetic brake connected to said roller,

a pair of contacts adapted to ride over said web, and spaced a predetermined distance from said punch on the input side of. said punch, said contacts being adapted to complete a circuit through said conductive lines when said web is properly registered for said punch, control means connected to said contacts to actuate said magnetic clutch and said magnetic brake to momentarily stop said web for the operation of said punch, said control means including a first gas tube connected to operate said brake, a second gas tube connected to operate said clutch and cam operated reset switch means permitting triggering by said controls only during a predetermined portion of the cycle, whereby said controls may not be triggered by conductive ink on said web other than said conductive lines, by-pass switch means connected in parallel with said contacts to provide continuity of operation in the event said contacts miss one of said conductive lines, and automatic takeaway means for said web.

References Cited by the Examiner UNITED STATES PATENTS 1/10 Stohr 83371 11/55 Payne 83-37l 1/56 Lundahl 83-371 2/56 Martell 83-371 2/59 Meunier 83-371 LEON PEAR, Primary Examiner.

HUNTER c, BOURNE, ]R., Examiner. 

